mysql8 主从搭建

主：192.168.10.2
从：192.168.10.3

主：
1.登录mysql，授权账号，让从数据库可以进行复制。

mysql
CREATE USER 'repl'@'192.168.10.3' IDENTIFIED BY 'mysql23';
grant replication slave on *.* to 'repl'@'192.168.10.3';
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000004 | 156 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

从：

mysql
stop slave;
change master to master_host='192.168.10.2',master_user='repl',master_password='mysql23',master_log_file=' mysql-bin.000004',master_log_pos=156;
start slave;
show slave status \G;

注：server-id主从库一定不一样。